摘要
采用sol-gel法制备了固体超强酸SO2-/ZrO2以及Sn-SOSO2-/ZrO2催化剂,用Hammett指示剂法对催化剂酸强度进行表征,并考察了其对乙酸和正丁醇的酯化活性,实验结果表明,Sn(Ⅳ)SZ的活性优于SOSO2-/ZrO2和Sn(Ⅱ)SZ。实验优化条件为:醇酸物质的量比为1.4:1,Sn(Ⅳ)SZ催化剂用量为0.5g(乙酸0.41mol),反应时间为3～4h,乙酸转化率可达96%以上。
SO2-4/ZrO2 and Sn-SO2-4/ZrO2 solid superacids have been prepared with sol-gel method.The acid strength of catalyst has been studied by Hammett indicator method,and their esterificattion activity for n-butanol with acetic acid has been examined.Activity of Sn（Ⅳ）SZ catalysts in esterificattion was better than activity of SO2-4/ZrO2 and Sn（Ⅱ）SZ.The results showed that the optimum conditions were as follows：the molar ratio of n-butanol to acetic acid was 1.4∶l,the weight of the catalyst was 0.5 g（if the weight of acetic acid was 0.41 mol）,the reaction time was 3～4 h,the yield of butyl acetate was about 96%.
出处
《天津化工》
CAS
2011年第1期15-17,共3页
Tianjin Chemical Industry
关键词
固体超强酸
催化
乙酸丁酯
solid superacid
catalysis
butyl acetate
